CN103219652B - Large-current closed inflatable spark interval - Google Patents
Large-current closed inflatable spark interval Download PDFInfo
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- CN103219652B CN103219652B CN201310094571.1A CN201310094571A CN103219652B CN 103219652 B CN103219652 B CN 103219652B CN 201310094571 A CN201310094571 A CN 201310094571A CN 103219652 B CN103219652 B CN 103219652B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a large-current closed inflatable spark interval so as to achieve high reliability, high gas tightness and the like of a gas switch and enlarge application range of the gas switch. The spark interval comprises a metal cover board, an upper electrode supporting base, a lower electrode supporting base, an upper electrode, a lower electrode, an insulating sleeve, an upper metal disc, a lower metal disc, an upper metal hoop and a lower metal hoop, wherein the metal cover board is arranged coaxially. The insulating sleeve is designed through wavy skirt edges so as to increase the edge surface distance between the metal cover board and the lower electrode supporting base. The upper electrode supporting base and the metal cover board are manufactured separately, and the mechanical connection of the upper electrode supporting base and the metal cover board can be achieved through an upper screw. The two metal discs which can move freely are led in so as to achieve the mechanical connection among the metal cover board, the lower electrode supporting base and the insulating sleeve. The upper screw is in tight connection with the upper electrode through a thread structure, a lower screw is in tight connection with the lower electrode through a thread structure, so that replacement is more convenient. A circular truncated cone is designed to ensure the contact area and tightness between each electrode and each electrode supporting base, increase the reliability of the gas switch, reduce the ablation volume of contact portions, and prolong the service life of the switch.
Description
Technical field
The invention belongs to gas spark switch technology, be specifically related to a kind of large circuit closed inflation spark gap, i.e. spark switch.
Background technology
Pulse Power Techniques have very important application in national defence scientific research and high-technology field, and have been applied to more industry and civil area now, have development and application prospect very widely.The general principle of Pulse Power Techniques is by the high density energy of storing in the long period, by compressing and converting, discharges rapidly to load.Pulse Power Techniques often relate to high amplitude voltage, the application of large electric current and steep-sided pulse gas discharge aspect.
The switch that large electric current, High Coulomb shift has very important effect in pulse power system, as in the device such as inertial confinement fusion, electromagnetic emission.In the application of these devices, require switch can bear large electric current, can there is again the longer life-span.In pulse power, conventional switch mainly contains following several: gas spark switch, counterfeit spark switch, vacuum switch, laser triggered switch, thyratron, magnetic switch, semiconductor opening switch, solid dielectric and liquid medium discharge switch, photoconductive semiconductor switches etc.Wherein, gas spark switch is because low, the through-flow energy of cost is strong, ON time rapid and longer life is used widely.
Before the present invention, 201010128326.4 two parts of patents of application number 200910022937.8 and application number have provided the gas switch in two kinds of common pulse power systems.But, all inevitably there is following comparatively serious shortcoming in them: 1) for ensureing the air-tightness of switch, the normal insulation blanket stud that uses is reinforced, after insulation blanket stud is aging, can cause air-tightness to reduce, the former increases assembly difficulty, the latter increases maintenance difficulties, easily forms impurity layer on insulation blanket stud simultaneously, reduces the insulation level between upper/lower electrode; 2) for reducing the ablation between electrode and electrode support, improve through-current capability, need to ensure to connect closely between the two, often have method (the method for heat expansion and cold contraction or pressure ring method) to realize comparatively complicated, cannot ensure that the densification connecting is reliable, after long-term use, switch life greatly reduces; 3) clearance distance between electrode is fixed, and causes the scope of application less, if will change electrode gap distance, need to change the physical dimension of a whole set of switch, is difficult to the scientific research needs that Adaptive change.
Summary of the invention
For the defect of prior art, the object of the present invention is to provide a kind of brand-new large circuit closed inflation spark gap, be intended to improve above defect, realize high reliability, the high-air-tightness etc. of gas switch, and expand its range of application.
For reaching the above object, the present invention takes following technical scheme to be achieved: a kind of large circuit closed inflation spark gap, it is characterized in that, this spark gap comprises coaxially arranged metal cover board, top electrode bearing, top electrode, bottom electrode, bottom electrode bearing, insulating sleeve, upper metal dish, lower metal dish, upper ferrule and lower ferrule;
Metal cover board is cylindric, its inner bottom part center is with boss, this boss center is provided with through hole, on metal cover board circumference, be provided with the circular hole of the annular distribution for installing soket head cap screw, periphery lower edge area is provided with groove, upper sealing washer is placed in this groove, and described boss central bottom is provided with the cylindrical protrusions of threaded structure;
Top electrode bearing is arranged at metal cover board lower central position, also be provided with through hole, top electrode bearing top is provided with the cylinder shape groove of strap bolt structure, the helicitic texture interlock of bolt arrangement and metal cover board boss central bottom, ensures that the connection of metal cover board and top electrode bearing is closely reliable; Top electrode is arranged at top electrode bearing lower central position, and top, axle center is provided with screwed hole, and top electrode and top electrode bearing bound fraction are truncated cone-shaped, ensures that contact area is sufficient and connects closely; Upper screw rod is arranged in the through hole of metal cover board and top electrode bearing, with the screwed hole interlock of top electrode, ensures that top electrode is connected with top electrode bearing closely reliable;
Bottom electrode bearing is cylindric, its inner bottom part center is with bottom electrode mount pad, on bottom electrode mount pad, be provided with the through hole for lower screw rod is installed, the edge of bottom electrode bearing is provided with symmetrical for the circular hole of lower soket head cap screw is installed, the inner side, edge of bottom electrode bearing is provided with the groove for placing lower sealing washer, bottom electrode is arranged on bottom electrode mount pad, is axial symmetry with top electrode, between top electrode and bottom electrode, leaves gas gap; Bottom electrode bottom is provided with screwed hole; Lower screw rod is arranged in the through hole of bottom electrode bearing, with the screwed hole interlock of bottom electrode, ensures that bottom electrode is connected with bottom electrode bearing closely reliable; Bottom electrode bearing and bottom electrode bound fraction are truncated cone-shaped, to ensure that contact area is sufficient and to connect closely;
Insulating sleeve is cylindrical structure, in connection metal cover plate and bottom electrode bearing, ensures both mutually insulateds on electric; The surfaces externally and internally of insulating sleeve adopts shirt rim design, and the outer wall of insulating sleeve offers the groove of the upper ferrule for embedding annular at upper end, and the outer wall of insulating sleeve offers the groove of the lower ferrule for embedding annular at lower end;
Upper metal dish is arranged on the bottom of metal cover board, and be provided with symmetrical circular hole, supporting with the circular hole on metal cover board, realize the mechanical connection of upper metal dish and metal cover board by upper soket head cap screw, and drive insulating sleeve crimping upper sealing washer by upper ferrule, upper sealing washer is evenly distributed in the groove of metal cover board, ensures the air-tightness of gas switch;
Lower metal dish that can be freely movable is arranged on the top of bottom electrode bearing, be provided with bottom electrode bearing on the circular hole of the supporting distribution of circular hole, realize the mechanical connection of lower metal dish and bottom electrode bearing by lower soket head cap screw, and drive insulating sleeve crimping lower sealing washer by lower ferrule, lower sealing washer is evenly distributed in the groove of bottom electrode bearing;
Between metal cover board, insulating sleeve, top electrode bearing, bottom electrode bearing, top electrode and bottom electrode, form annular inflatable cavity;
Air admission hole and venthole are symmetricly set in the side of bottom electrode bearing.
As the improvement of technique scheme, the bottom of top electrode and the top of bottom electrode are through rounding processing.
, compared with prior art, there is following advantage in the above technical scheme of conceiving by the present invention:
1. insulating sleeve adopts the design of wave shirt rim, can increase the creepage distance between metal cover board and bottom electrode bearing, and the destruction to surface insulation ability such as dust, impurity can be effectively offset in the design of wave shirt rim, thereby ensures surface insulation ability.
2. top electrode bearing and metal cover board two parts are separately made, realized both mechanical connections by upper screw rod.So only need to change the size of an independent device of top electrode bearing, can change the distance of the gas gap between top electrode and bottom electrode, thereby meet scientific research demand widely.
3. two metal dish that can be freely movable have been introduced, between upper metal dish and metal cover board and lower metal dish and bottom electrode bearing, be connected and fixed by interior hexangle type clamp nut respectively, and by the ferrule outside embedded insulating sleeve, realize metal cover board, bottom electrode bearing and the triangular mechanical connection of insulating sleeve.This kind of fastening method reduced construction of switch size, and the design that simplifies the structure, has improved the air-tightness of gas-filled cavity, and ensures that the insulation property between metal cover board and bottom electrode bearing are good.
4. upper and lower screw rod is closely connected with upper and lower electrode by helicitic texture, makes the replacing of switch upper/lower electrode more convenient; Round platform design has ensured contact area and the compactness that electrode and electrode support are shown in, increases the reliability of gas switch, reduces the ablation amount of contact portion, extends switch life.
Brief description of the drawings
Fig. 1 is a kind of structural representation of a kind of embodiment of large circuit closed inflation spark gap.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, be used for helping to understand the present invention for the explanation of these execution modes, but do not form limitation of the invention.In addition,, in each execution mode of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
As shown in Figure 1, large circuit closed inflation spark gap gas switch provided by the invention adopts coaxial configuration in shape, it specifically comprises metal cover board 1, top electrode bearing 2, bottom electrode bearing 3, top electrode 4, bottom electrode 5, upper screw rod 6, lower screw rod 7, insulating sleeve 8, upper metal dish 9, lower metal dish 10, upper sealing washer 11, lower sealing washer 12, upper ferrule 13, lower ferrule 14, upper soket head cap screw 15, lower soket head cap screw 16, air admission hole 17, venthole 18 and gas-filled cavity 19.
Metal cover board 1 is cylindric, its inner bottom part center is with boss, this boss center is provided with through hole, on cover plate circumference, be provided with the circular hole of the annular distribution for installing soket head cap screw 15, periphery lower edge area is provided with groove, be used for placing upper sealing washer 11, boss central bottom is provided with the cylindrical protrusions of threaded structure.
Top electrode bearing 2 is arranged at metal cover board 1 lower central position, be provided with through hole, top electrode bearing 2 tops are provided with the cylinder shape groove of strap bolt structure, and the helicitic texture interlock of bolt arrangement and metal cover board 1 bottom ensures that the connection of metal cover board 1 and top electrode bearing 2 is closely reliable.Top electrode 4 is arranged at top electrode bearing 2 lower central positions, and top, axle center is provided with screwed hole, and top electrode 4 is truncated cone-shaped with top electrode bearing 2 bound fractions, ensures that contact area is sufficient and connects closely.Upper screw rod 6 is arranged in the through hole of metal cover board 1 and top electrode bearing 2, with the screwed hole interlock of top electrode 4, ensures that top electrode 4 is connected with top electrode bearing 2 closely reliable.
Bottom electrode bearing 3 is cylindric, its inner bottom part center is with bottom electrode mount pad, on bottom electrode mount pad, be provided with the through hole for lower screw rod 7 is installed, cylinder edge area is provided with symmetrical for the circular hole of lower soket head cap screw 16 is installed, inner side, cylinder edge area is provided with the groove of certain depth, for placing lower sealing washer 12.Bottom electrode 5 is arranged at bottom electrode mount pad, is axial symmetry with top electrode 4, between top electrode 4 and bottom electrode 5, leaves gas gap.Bottom electrode 5 bottoms are provided with screwed hole.Lower screw rod 7 is arranged in the through hole of bottom electrode bearing 3, with the screwed hole interlock of bottom electrode 5, ensures that bottom electrode 5 is connected with bottom electrode bearing 3 closely reliable.Bottom electrode bearing 3 is truncated cone-shaped with bottom electrode 5 bound fractions, ensures that contact area is sufficient and connects closely.
Insulating sleeve 8 adopts the material of high insulating property to make, and is cylindrical structure, in connection metal cover plate 1 and bottom electrode bearing 3, ensures both mutually insulateds on electric.The surfaces externally and internally of insulating sleeve 8 adopts shirt rim design, thereby increases the actual creepage distance of metal cover board 1 and bottom electrode bearing 3, to improve insulating capacity.The outer wall of insulating sleeve 8 offers two thin grooves at upper and lower side place, corresponding upper ferrule 13 and the lower ferrule 14 that embeds annular in thin groove.
Upper metal dish 9 is arranged on the bottom of metal cover board 1, and be provided with symmetrical circular hole, supporting with the circular hole on metal cover board 1, realize the mechanical connection of upper metal dish 9 and metal cover board 1 by upper soket head cap screw 15, and drive insulating sleeve 8 crimping upper sealing washers 11 by upper ferrule 13, upper sealing washer 11 is evenly distributed in the groove of metal cover board 1, ensures the air-tightness of gas switch.
Equally, lower metal dish 10 that can be freely movable is arranged on the top of bottom electrode bearing 3, be provided with bottom electrode bearing 3 on the circular hole of the supporting distribution of circular hole, realize the mechanical connection of lower metal dish 10 and bottom electrode bearing 3 by lower soket head cap screw 16, and drive insulating sleeve 8 crimping lower sealing washers 12 by lower ferrule 14, lower sealing washer 12 is evenly distributed in the groove of bottom electrode bearing 3.
Between metal cover board 1, insulating sleeve 8, top electrode bearing 2, bottom electrode bearing 3, top electrode 4 and bottom electrode 5, form annular inflatable cavity 19.
Upper metal dish 9 and lower metal dish 10 all adopt metal material to make, and upper sealing washer 11 and lower sealing washer 12 can be made of acrylonitrile-butadiene rubber, and upper ferrule 13 and lower ferrule 14 can be according to insulating sleeve actual size size design processing.
Air admission hole 17 and venthole 18 are symmetricly set in the side of bottom electrode bearing 3, its effect mainly contains two, the one, ensure that switch air pressure inside is adjustable in the course of the work, the 2nd, by graphite electrode because of arc erosion produce the gas such as carbon monoxide or nitric oxide be regularly disposed to outside switch.
Rounding processing is done on the top of the bottom of top electrode 4 and bottom electrode 5, can prevent like this electric field distortion between the two, makes to form between top electrode 4 and bottom electrode 5 an approximate uniform electric field.Between top electrode 4 and bottom electrode 5, leave certain distance (be gas gap, be generally 2mm～20mm, preferably 8mm left and right).
Top electrode bearing 2 and bottom electrode bearing 3 by can be high temperature resistant and the good high-strength material of rigidity make, can adopt the material such as stainless steel, aluminium alloy.5 of top electrode 4 and bottom electrodes use high-purity and high-intensity graphite.
Switch conduction moment, can produce electric arc, ultraviolet ray and electromagnetic force etc. in gas-filled cavity 19, and this can make switch insulation sleeve 8 performance degradations, thereby reduces switch useful life and affect the reliability and stability of switch.Therefore the insulating material that, should select to have high ultraviolet tolerance, high mechanical properties is made insulating sleeve 8.Conventional material has epoxide resin material, bakelite, polymethyl methacrylate etc.What in Fig. 1, insulating sleeve 8 used is pmma material.
After assembling completes, by external route controller, pass into insulating gas by air admission hole 17 to switch inside, charge air conditioning can be dry air, or nitrogen and oxygen are mixed according to a certain percentage.Doping oxygen can make the moment of switch conduction, graphite electrode surface Partial ablation produces the gases such as carbon monoxide and carbon dioxide, thereby avoiding producing small solid particle sticks to electrode surface and causes electric field distortion, also can avoid by this pollution of insulating cylinder inwall, to ensure the recovery of switch gap insulation property, the probability of sudden strain of a muscle certainly that reduces switch, is conducive to improve switch reliability and switch life.
Operation principle of the present invention is as follows: in the course of work of large circuit closed gas switch, the top electrode 4 being connected with top electrode bearing 2 is negative electrode, the bottom electrode 5 being connected with bottom electrode bearing 3 is anode, and insulating sleeve 8 is realized the electric insulation between top electrode bearing 2 and bottom electrode bearing 3.In the time of work, between top electrode 4 and bottom electrode 5, apply certain direct voltage by charging device, this direct voltage value should be less than the DC break down voltage value of switch, thereby between upper/lower electrode, form certain electric field, again the trigger impulse voltage of an external trigger device output is put on bottom electrode bearing 3, make to produce discharge channel and form electric arc in the gas gap between top electrode 4 and bottom electrode 5 by over-voltage breakdown, thereby cause switch main gap to puncture.Can provide the equipment of above-mentioned trigger impulse voltage to comprise pulse transformer, impulse voltage generator (Marx generator) etc.
The breakdown voltage value of gas switch changes along with the change of air-gap separation between top electrode 4 and bottom electrode 5, conventionally after thousands of inferior puncturing, graphite electrode surface becomes large because ablation effect meeting makes air-gap separation, therefore gas switch, after using a period of time, need to could come into operation again by changing electrode.The method that this switch has adopted top electrode bearing 2 to separate with metal cover board 1, after repeatedly using, can ensure that the air gap distance between top electrode 4 and bottom electrode 5 maintains in the scope of needs by the top electrode bearing 2 of changing different length, thereby improve the useful life of graphite electrode, and ensure its economy.
The foregoing is only a certain embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.Do not depart from the equivalence or the amendment that under spirit disclosed in this invention, complete so every, all fall into the scope of protection of the invention.
Claims (3)
1. a large circuit closed inflation spark gap, it is characterized in that, this spark gap comprises coaxially arranged metal cover board (1), top electrode bearing (2), top electrode (4), bottom electrode (5), bottom electrode bearing (3), insulating sleeve (8), upper metal dish (9), lower metal dish (10), upper ferrule (13) and lower ferrule (14);
Metal cover board (1) is cylindric, its inner bottom part center is with boss, this boss center is provided with through hole, on metal cover board (1) circumference, be provided with the circular hole of the annular distribution for installing soket head cap screw (15), periphery lower edge area is provided with groove, upper sealing washer (11) is placed in this groove, and described boss central bottom is provided with the cylindrical protrusions of threaded structure;
Top electrode bearing (2) is arranged at metal cover board (1) lower central position, also be provided with through hole, top electrode bearing (2) top is provided with the cylinder shape groove of strap bolt structure, the helicitic texture interlock of bolt arrangement and metal cover board (1) boss central bottom, ensures that the connection of metal cover board (1) and top electrode bearing (2) is closely reliable; Top electrode (4) is arranged at top electrode bearing (2) lower central position, and top, axle center is provided with screwed hole, and top electrode (4) is truncated cone-shaped with top electrode bearing (2) bound fraction, ensures that contact area is sufficient and connects closely; Upper screw rod (6) is arranged in the through hole of metal cover board (1) and top electrode bearing (2), with the screwed hole interlock of top electrode (4), ensures that top electrode (4) is connected with top electrode bearing (2) closely reliable;
Bottom electrode bearing (3) is cylindric, its inner bottom part center is with bottom electrode mount pad, on bottom electrode mount pad, be provided with the through hole for lower screw rod (7) are installed, the edge of bottom electrode bearing (3) is provided with symmetrical for the circular hole of lower soket head cap screw (16) is installed, the inner side, edge of bottom electrode bearing (3) is provided with the groove for placing lower sealing washer (12), bottom electrode (5) is arranged at bottom electrode mount pad, be axial symmetry with top electrode (4), between top electrode (4) and bottom electrode (5), leave gas gap; Bottom electrode (5) bottom is provided with screwed hole; Lower screw rod (7) is arranged in the through hole of bottom electrode bearing (3), with the screwed hole interlock of bottom electrode (5), ensures that bottom electrode (5) is connected with bottom electrode bearing (3) closely reliable; Bottom electrode bearing (3) is truncated cone-shaped with bottom electrode (5) bound fraction, to ensure that contact area is sufficient and to connect closely;
Insulating sleeve (8) is cylindrical structure, in connection metal cover plate (1) and bottom electrode bearing (3), ensures both mutually insulateds on electric; The surfaces externally and internally of insulating sleeve (8) adopts shirt rim design, the outer wall of insulating sleeve (8) offers the groove of the upper ferrule (13) for embedding annular at upper end, the outer wall of insulating sleeve (8) offers the groove of the lower ferrule (14) for embedding annular at lower end;
Upper metal dish (9) is arranged on the bottom of metal cover board (1), and be provided with symmetrical circular hole, supporting with the circular hole on metal cover board (1), by the mechanical connection of metal dish (9) and metal cover board (1) in upper soket head cap screw (15) realization, and drive insulating sleeve (8) crimping upper sealing washer (11) by upper ferrule (12), upper sealing washer (11) is evenly distributed in the groove of metal cover board (1), ensures the air-tightness of gas switch;
Lower metal dish (10) that can be freely movable is arranged on the top of bottom electrode bearing (3), be provided with bottom electrode bearing (3) on the circular hole of the supporting distribution of circular hole, realize the mechanical connection of lower metal dish (10) and bottom electrode bearing (3) by lower soket head cap screw (16), and drive insulating sleeve (8) crimping lower sealing washer (12) by lower ferrule (14), lower sealing washer (12) is evenly distributed in the groove of bottom electrode bearing (3);
Between metal cover board (1), insulating sleeve (8), top electrode bearing (2), bottom electrode bearing (3), top electrode (4) and bottom electrode (5), form annular inflatable cavity (19);
Air admission hole (17) and venthole (18) are symmetricly set in the side of bottom electrode bearing (3).
2. large circuit closed inflation spark gap according to claim 1, is characterized in that, the top of the bottom of top electrode (4) and bottom electrode (5) is through rounding processing.
3. large circuit closed inflation spark gap according to claim 1 and 2, is characterized in that, described gas gap is 2mm～20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310094571.1A CN103219652B (en) | 2013-03-22 | 2013-03-22 | Large-current closed inflatable spark interval |
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| CN201310094571.1A CN103219652B (en) | 2013-03-22 | 2013-03-22 | Large-current closed inflatable spark interval |
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| CN103219652A CN103219652A (en) | 2013-07-24 |
| CN103219652B true CN103219652B (en) | 2014-07-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104022495A (en) * | 2014-06-04 | 2014-09-03 | 中国科学院等离子体物理研究所 | Crowbar protection device |
| CN105405729B (en) * | 2015-11-06 | 2017-09-08 | 许继电源有限公司 | Two-electrode gas is switched |
| CN107546732A (en) * | 2017-10-13 | 2018-01-05 | 广东电网有限责任公司湛江供电局 | A kind of overvoltage protection based on laser conducting transformer station |
| CN108767660A (en) * | 2018-05-23 | 2018-11-06 | 西北核技术研究所 | A kind of micro groove structure cathode gas spark switch |
| CN108767839A (en) * | 2018-05-29 | 2018-11-06 | 华能国际电力股份有限公司 | Overvoltage protection device |
| CN110336131B (en) * | 2019-06-18 | 2021-01-19 | 中国舰船研究设计中心 | Direct lightning protection device of shipborne short wave communication system and protection evaluation method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3588576A (en) * | 1968-11-25 | 1971-06-28 | Joslyn Mfg & Supply Co | Spark-gap device having a thin conductive layer for stabilizing operation |
| DE3534821A1 (en) * | 1985-09-30 | 1987-04-02 | Raupach Friedrich | Spark switch |
| CA1289171C (en) * | 1987-07-20 | 1991-09-17 | Frank Kitzinger | Electromechanically triggered spark gap switch |
| US4912369A (en) * | 1988-09-16 | 1990-03-27 | United States Of America As Represented By The Secretary Of The Navy | High PRF high current switch |
| CN2056285U (en) * | 1989-10-28 | 1990-04-18 | 中国科学院力学研究所 | High-current switch with high repeat frequency |
| CN101577396B (en) * | 2009-06-12 | 2012-05-23 | 西安交通大学 | Two-electrode spark gap gas switch |
| CN101783480B (en) * | 2010-03-22 | 2012-09-05 | 华中科技大学 | Two-electrode gas spark switch |
| CN202737316U (en) * | 2012-06-04 | 2013-02-13 | 中国工程物理研究院应用电子学研究所 | Rotating-electrode gas spark gap switch |
| CN102904162A (en) * | 2012-10-22 | 2013-01-30 | 云南电力试验研究院（集团）有限公司电力研究院 | Multichannel gas spark switch based on ultraviolet preionization technology |
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